Cisco Rfgw1d Manual

 
 
 Secure License Transfer 
 
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Result: The following email will be sent with the generated token. 
 
Note: The case is closed and you will now be able to use this license for another 
device. Refer to Obtaining a License File (on page 157). 
  

 
 
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Introduction 
This chapter describes how to integrate the RFGW-1 into scrambling 
applications.  
 
 
13 Chapter 
13 
Encryption and Scrambling 
In This Chapter 
 Introduction ......................................................................................... 170 
 Scrambling, Control Word, and Cryptoperiod ............................... 171 
 Access Criteria and Access Rights .................................................... 172 
 Entitlement Control...

 
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Introduction 
The RF Gateway 1 is provided with a DVB Simulcrypt compliant scrambler designed 
to meet DVB Simulcrypt Conditional Access (CA) specifications ETSI TS 103 197.  
There are many CA Systems in use and the goal of the RF Gateway 1 is to integrate 
the devices in as many CA Systems as possible.  To achieve this, a common set of 
protocols and interfaces between scramblers and CA Systems is required. 
The RF Gateway 1...

 
 
 Scrambling, Control Word, and Cryptoperiod 
 
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Scrambling, Control Word, and Cryptoperiod 
At the transmission site of a CA System, services multiplexed into a Transport 
Stream can be scrambled using a DVB common scrambling algorithm with a 
scrambling/descrambling key called Control Word (CW).  At the receiver site, the 
scrambled services can be descrambled by an appropriate descrambling algorithm 
using the same CW. 
 
To increase the security of a CA System, the CW...

 
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Access Criteria and Access Rights 
When a subscriber is only interested in particular services, i.e. sports and nature, he 
only wants to pay for those services.  Unpaid services must remain unintelligible.  
Therefore, two parameters are defined, Access Criteria (AC) and Access Rights. 
 Access Criteria is vendor specified information and specifies service-related 
criteria applied to a package of services or elementary streams....

 
 
 Entitlement Control Messages 
 
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Entitlement Control Messages 
The SCS triggered from the EIS to start a CA event will get every Crypto Period a 
CW for this event from the CWG. For more information, refer to Event Information 
Scheduler (on page 174). 
  
  
The SCS extracts the AC from the Scrambling Control Group (SCG) information 
received from the EIS.  The synchronizer sends this AC together with the CW for the 
corresponding Crypto Period to the Entitlement Control...

 
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Event Information Scheduler 
The EIS is the functional unit in the CA System that holds the schedule, 
configuration, and other information required for the complete CA system. 
 
To start a scrambling event, the EIS provides the SCS with a SCG provisioning 
message.  The message contains a list of services and/or elementary streams that 
must be scrambled at the same time with the same CW and a list with ECM groups 
for which ECMs...

 
 
 Scrambling Levels 
 
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Scrambling Levels 
Scrambling can be done on an elementary stream level or service level.  The 
following list describes these scrambling levels. 
Elementary Stream Level Scrambling 
Each component of a service may be scrambled by a separate CW.  For example, 
video and audio may be scrambled with a separate CW.  This is useful in 
multilingual systems where a premium is charged for a second audio in a different 
language.  In this case, each...

 
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Service Level Scrambling 
The alternative to elementary stream level scrambling is to scramble all components 
that make up a service with the same CW.  In this case, there is only one stream of 
ECM messages associated with the service as a whole. 
 
 
When scrambling at the service level, all elementary streams within the service are 
scrambled using the same CW.  Only one ECM is required for each service.  The CA 
descriptor is...